Why so much contact between them,confused and more confused?

Hi everybody I am new to this forum!!, so my issue is that my boyfriend has a female friend which happens to had been his real state agent when he purchased his new house, he told me they met a little after him and I started dating, but he told me they are also Friends’’, they’re around the same age group, he is older than her and me, so when my boyfriend did his housewarming party, he invited me and my family plus his family and friends including her, I got a bad vibe when I saw her trying to get her nose in everything in the house, like she was trying to win his family over, bring all the things, food, etc, I saw clearly that she was trying to get his attention all the time, she clearly likes this man, and I noticed him tense, likes stressed in the party and my aunt which is older told me that she clearly noticed that he did look tense and nervous, anxious.

This girl is always messaging him, telling him her problems about her adopted kids, family issues, she even sends him a text asking him if he was free at night, so they can go out, my boyfriend is very noble, good person and wins a good salary, I told him the day after the housewarming party that I did not like her at all. I don’t even talk to my boyfriend this much, or message him, like this woman does!! MAYBE I SHOULD START DOING IT MORE OFTEN.

This woman even wanted to be his roommate in the new house he bought for US, she wanted to live in a bedroom efficiency type, mind you this woman has like 3–4 adopted kids. I recently saw some messages she sends him, and she seems desperate for his attention, always initiating contact with him, they used to text through what’s app but now they text more through normal text message, but this past weekend we went to Disney world, and he had told her that we were going with his friends, we left on Friday and that same day in the afternoon she texts him on What’s app and says :’‘Hi, what are you doing’’? In Spanish and my boyfriend saw the message, but did not reply since we were in Disney with his friend, but still he could have replied to her at the moment, but didn’t I WONDER WHY?, so I guess she saw that, and then on Sunday she text him again saying: wow you don’t say hi anymore!, OK. And that’s it. I wonder why he did not reply her? And why in some earlier messages that she has asked him if they can hang out, he tells her he is too busy, that he has too much work, and he has brushed her off a couple of times as I saw in the messages.

The thing is that well, he did in fact answer her on past Tuesday (we came late on past Monday) and then he replied to her on Tuesday September 4th’‘Oh sorry for not answering’’, I had been in the Disney parks til late and plus my battery was dead. And then he invited her to eat to thereby talk about business (she offered him if he wanted to join her on her towels business) so she replied that she couldn’t cause she was going to go out with her cousin and her cousins husband, and he replied: OK you let me know If not we go tomorrow (which he meant to Wednesday) but I went out with him yesterday, just to see if he was going to give me an excuse, thereby I would have known that he in fact was going to go out with her.

I don’t know what to do, I feel confused, insecure, should I talk to him openly about all of this with honesty or just wait until I see more of their interactions through their conversations and see if something is really happening? Why would he still be in touch with her if he very well knows, she likes him, and wants something more with him? Cause I am sure he knows that she likes him, he is neither dumb nor retarded.